65 Dodge Coronet
 

I recently just bought a 1965 Dodge Coronet as my first car. The body and interior is in fairly good condition for being all original for the most part.
But under the hood is a 318 wedge 2 barrel engine. Its currently not running.
I know the rear left brake is locked up. It is a drum brake. I'm going to rebuild the engine into a 383.
If anyone can give me tips or hints on anything, please let me know.
Also if you could tell me on how to unlock drum brakes would be great.